Historical national accounting is nowadays recognized as an important field of research in economic history. Nevertheless the sub discipline also receives a lot of criticism. Several estimates would be based on shaky data material so that the outcome would in part reflect the personal opinion of those who produced the series. Moreover in some publications the estimation methods are explained in very vague terms thereby making a duplication of the results almost impossible. This book tries to remedy these critiques. The estimation procedures of the various components of Belgian national income between 1920 and 1939 are thoroughly discussed and explained. The book also falsifies the proposition that "Belgium is a country without statistics". There are many series available but they are scattered over many publications and therefore often difficult to find. One merit of this book is that it brings together quantitative material from very diverse sources and origins. Not only economic historians will benefit from the wealth of statistics presented here, but also e.g. social historians.